1. Winds Difference in air pressure Horizontal movement of air
High pressure moves to low pressure
Unequal heating off air
Warmer expands = less dense
= less air pressure
Cooler expands = more dense
= higher air pressure
What causes
winds?
What changes
air pressure?

3. How is wind
measured?
What is the
wind-chill
factor?
Direction – wind vane
Named for where they come from. Ex. Blows south comes from north
Measured with anemometer
Wind turns cups
Cooling effect from wind
Stronger wind = cooler the feeling

4. What are
local winds?
Unequal heating of air in small area
Often occurs where land is by large body of water.

5. Land Breeze – Nighttime Draw this picture then take notes
Land cools faster than water – cools air above  cool air move out to
sea pushes warm air up
2. Water stays warmer than land – air stays warmer  warm air rises

6. Sea Breeze – Daytime Draw this picture then take notes
Water is warms slower than land – cooler air above  cool air moves towards land pushes warm air up.
2. Land warms faster than water – warm air rises  pushes warm air up

7. Just a different picture for you to look at!! NOTICE!!
Sea Breeze
Wind comes
from the sea
Land Breeze
from the land

8. Other Local Winds Draw pictures then take notes
Daytime
Air warms  rises
breeze up the mt.
Nighttime
Air cools  sinks
breeze down the
mountain

9. What is a
monsoon?
South and Southeast Asia
A large Sea Breeze in the summer

10. Literacy Do Now: 3/21 1. Open a Science Text Book to page 758. Today
~ Read pages 754 out loud in class
~ Complete the Observation and Inference worksheet – will be collected today.
When you finish the worksheet you may read quietly or work on homework.
HW: I did not leave the quiz – it will be Monday so, study the scientific method, observation and inference definitions